Why the mismatch has to feel good
In a mode where roughly two thirds of contacts do not break anything, the failure case is the majority of the run. Treating it as a failure would make most of the video feel like nothing happening.
So a mismatch is given its own physicality: the brick reflects the ball with a clink and a deflection. The ball’s path changes, its colour is now different, and the state of the run has genuinely moved even though nothing broke.
That is why the clink should be a pleasant sound rather than a buzzer. The viewer is going to hear it far more often than the break, and a run that punishes the ear two thirds of the time will not be watched twice.

